Sustainable Nutrient Management Package for Cost-effective Bioenergy Biomass Production
| Author | Sampson Agyin-Birikorang | |
| Author | George A. O’Connor | |
| Author | John E. Erickson | |
| Date of acession | 2024-03-18T07:47:08Z | |
| Date of availability | 2024-03-18T07:47:08Z | |
| Date of issue | 2013 | |
| Abstract | Commercial fertilizer (particularly nitrogen) costs account for a substantial portion of the total production costs of cellulosic biomass and can be a major obstacle to biofuel production. In a series of greenhouse studies, we evaluated the feasibility of co-applying Gibberellins (GA) and reduced nitrogen (N) rates to produce a bioenergy crop less expensively. In a preliminary study, we determined the minimum combined application rates of GA and N required for efficient biomass (sweet sorghum, Sorghum bicolor) production. Co-application of 75 kg ha−1 (one-half of the recommended N rate for sorghum) and a modest GA rate of 3 g ha−1 optimized dry matter yield (DMY) and N and phosphorus (P) uptake efficiencies, resulting in a reduction of N and P leaching. Organic nutrient sources such as manures and biosolids can be substituted for commercial N fertilizers (and incidentally supply P) to further reduce the cost of nutrient supply for biomass production. Based on the results of the preliminary study, we conducted a second greenhouse study using sweet sorghum as a test bioenergy crop. We co-applied organic sources of N (manure and biosolids) at 75 and 150 kg PAN ha−1 (representing 50 and 100% N rate respectively) with 3 g GA ha−1 . In each batch of experiment, the crop was grown for 8 wk on Immokalee fine sand of minimal native fertility. After harvest, sufficient water was applied to soil in each pot to yield ∼1.5 L (∼0.75 pore volume) of leachate, and analyzed for total N and soluble reactive P (SRP). The reduced (50%) N application rate, together with GA, optimized biomass production. Application of GA at 3 g ha−1 , and the organic sources of N at 50% of the recommended N rate, decreased nutrient cost of producing the bioenergy biomass by ∼$375 ha−1 (>90% of total nutrient cost), and could reduce offsite N and P losses from vulnerable soils | |
| Citation | Agyin-Birikorang, S., G.A. O’Connor and J.E. Erickson. 2013. “Sustainable Nutrient Management Package for Cost-Effective Bioenergy Biomass Production,” Journal of Plant Nutrition, 36:1881-1900 | |
| URL | https://hub.ifdc.org/handle/20.500.14297/2928 | |
| Language | en | |
| Subject | Manures | |
| Subject | Leaching | |
| Subject | Sorghum | |
| Subject | Gibberellins | |
| Title | Sustainable Nutrient Management Package for Cost-effective Bioenergy Biomass Production | |
| Type | Article |